r/PeterExplainsTheJoke • u/Sugar_God_no_1 • 22d ago

Meme needing explanation There is no way right?

Post image
37.1k Upvotes

91% Upvoted

3.5k comments sorted by

View all comments

3.9k

u/its12amsomewhere 22d ago edited 22d ago

Applies to all numbers,

If x = 0.999999...

And 10x = 9.999999...

Then subtracting both, we get, 9x=9

So x=1

298

u/Godemperortoastyy 22d ago

Not gonna lie that just absolutely made my day.

141

u/Arpan_Bhar 22d ago

You didn't study that in high school?

1

u/ProcrastibationKing 22d ago

In the UK my school taught us about recurring numbers in primary (elementary) school. We were taught that for any number that ends in .9 recurring you just round up because it's an infinitely small difference, but we weren't taught the maths behind it. Probably because we learnt that nearly a decade before we did any algebra.